JP2569314Y2 - Signboard device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signboard device, and more particularly to a signboard device using the surface of a flexible sheet as an information display surface.

[0002]

2. Description of the Related Art A signboard in which a flexible sheet made of synthetic resin displaying various information such as characters, pictures, patterns, signs, etc. is tensioned so as not to loosen a rectangular annular frame, A signboard device that illuminates the above-mentioned sheet that is tense with the body by a backlight method has been conventionally known.

As shown in FIG. 8, such a sign device locks a fixing member a formed by framing an L-shaped steel into a rectangular shape and a bar member 11 provided at an end of the sheet 1. A bolt N as a seat tensioning mechanism having a hook portion c for tightening, a tightening nut d for tightening the J bolt b to the fixing member a, a lock nut e for preventing loosening of the tightening nut d, and a seat. 1 is provided with a bar f around which the outer peripheral portion is wound in an overlapping manner, a support frame g supporting the bar f, and auxiliary parts such as a J bolt b and a tightening nut d serving as a seat tensioning mechanism. The plurality of portions of the outer peripheral edge portion 13 of the sheet 1 outside the winding portion 12 with respect to the bar member f and the plurality of portions of the fixing member a corresponding to the respective portions are provided. h is a cover frame for covering the end of the seat 1, the J bolt b, and the like.

[0004]

SUMMARY OF THE INVENTION In such a signboard device, the seat 1 has a J as a seat tensioning mechanism.
The bolts b apply tension from a plurality of locations on the outer peripheral edge portion 13. That is, the winding portion 12 of the sheet 1
The sheet 1 is pulled outward by a J-bolt b provided over a plurality of locations between the outer peripheral edge portion 13 and the fixing member a, and the tension is applied to the sheet 1. Such a signboard device is often assembled on site to adjust the bias of the tension of the seat 1 or to eliminate its slack or waving.

However, according to the conventional signboard device, even if the seat 1 is not slackened or wavy at the beginning of assembly, various external factors such as wind and rain and sheet elongation appear over time, and the seat 1 is not affected. In some cases, the sheet 1 may be loosened or wavy, or the central portion of the sheet 1 may be depressed inward, and the sheet 1 may have a spherical shape. When these situations occur, the characters, pictures,
The contours of patterns, signs and the like are distorted, resulting in a disadvantage that the information display function is impaired or unsightly. This tendency is remarkable especially in a large signboard device larger than 2 m × 2 m.

[0006] The present invention has been made in view of the above circumstances, and despite the flexibility of the sheet, the sheet is loosened or wavy with the passage of time, and further, a spherical surface whose central portion is depressed inward. An object of the present invention is to provide a signboard device capable of avoiding occurrence of shaping.

[0007]

A signboard device according to the present invention has a housing having an opening, and an open edge of the housing which is disposed over the opening of the housing and has an outer peripheral portion surrounding the opening. And a plurality of sheet tensioning mechanisms provided to extend over the outer peripheral edge of the sheet and the housing outside the portion around the open edge of the sheet and to apply tension to the sheet. And pressure applying means for applying internal pressure to the housing whose open surface is covered with the sheet.

[0008]

According to this structure, it is possible to keep the internal pressure of the housing slightly higher than the outside air pressure by the pressure applying means, and by doing so, to apply a tension to the sheet to which the sheet is tensioned by the sheet tensioning mechanism. On the other hand, the internal pressure of the housing higher than the external pressure is applied, and the internal pressure keeps the sheet constantly pressed outward.

[0009]

FIG. 1 is a perspective view showing a signboard body A in a signboard device according to an embodiment of the present invention in a perspective view and a circuit diagram showing a pressure applying means B. FIG. 2 is a longitudinal sectional view of the signboard body A. 3
3 is a longitudinal sectional view showing a main part of FIG. 2, and as shown in these figures, the signboard main body A has a schematic structure in which a flexible sheet (hereinafter referred to as a sheet) 1 is provided on a front surface of a housing 2. It has a stretched structure.

The housing 2 has a box-shaped member 23 whose shape is retained and reinforced by rectangular frames 21 and 22 and whose front surface is open, and a rectangular annular sheet extending frame extending at the front end of the box-shaped member 23. 2
The housing 2 is provided with an opening 26 which is surrounded by a rectangular annular opening edge 25 which is a front end of the sheet stretching frame 24.

As shown in FIG. 2 or FIG. 3, the sheet stretching frame 24 has a flange 27 and a mounting plate 28 with a set screw 29, 3 between the rectangular frame 21 and a packing 29.
1, and the packing 29 is also sandwiched between the box-shaped member 23 and the rectangular frame 21.
That is, the airtightness of the joint between the rectangular frame 21 and the box-shaped member 23 and the sheet extending frame 24 is maintained by the packing 28. In addition, sheet stretching frame 2
A space formed in an outer peripheral portion of the seat 4 serves as a housing space 32 of the seat tensioning mechanism 24 such as a turn buckle, which will be described later. Are formed over the entire circumference.

The rectangular annular sheet stretching frame 24 is formed by connecting the ends of four straight sheet stretching frames 24a at right angles to each other and connecting the adjacent stretching frames 24a together. They are connected in a state of being aligned by pins 36 inserted into holes 35 provided at the front end of the sheet stretching frame 24a. The abutting portions of the four sheet stretching frame members 24a are joined by welding or the like so that airtightness is maintained.

A turnbuckle is used for the seat tensioning mechanism 4. The seat tensioning mechanism 4 includes a nut body 4 having a threaded portion at one end and the other end thereof in a reverse screw relationship.
1 and shafts 42 and 43 screwed to the respective threaded portions of the nut body 41. The rectangular engaging seat 47 provided on one of the shafts 42 on one side is provided with the groove portion. 34, and a hook portion 4 is attached to the shaft 43 on the other side.
6 are provided.

The sheet 1 is disposed so as to cover the opening 26, and the outer periphery of the sheet 1 is placed on the packing 5 disposed on the opening
It is wound around 5. Reference numeral 12 denotes a wrap portion around the open edge 25. A bar 11 is provided on the outer peripheral edge of the sheet 1 outside the winding portion 12, and the bar 11 is engaged with a hook 46 of the sheet tensioning mechanism 4. The seat tensioning mechanism 4 has a rectangular annular sheet stretching frame 24.
Are provided at a plurality of locations inside the accommodation space 32 at predetermined intervals. Therefore, the tension is applied to the seat 1 by rotating the nut bodies 41 in the plurality of seat tensioning mechanisms 4 in the tightening direction. As illustrated in FIG. 4, it is desirable to set the plurality of seat tensioning mechanisms 4 at the corners of the sheet stretching frame 24 and at a plurality of positions intermediate the corners.

Reference numeral 6 denotes a rectangular annular cover frame. The cover frame 6 is fixed using a stopper 38 in a state where the mounting seat 61 formed at the rear end of the cover plate 63 is overlapped with the mounting seat 37 of the seat stretching frame 24. In addition, an edge frame portion 64 provided inward at the front end portion of the cover plate portion 63.
Covers and covers the periphery of the sheet 1. Further, a packing 65 provided at a corner between the cover plate 63 and the edge frame 64 in the cover frame 6 is pressed against the winding portion 12 of the sheet 1 against the open edge 25. Further, a support plate 66 is provided on the cover frame 6, and the rear end 67 of the support plate 66 is attached to the mounting plate 28 of the sheet stretching frame 24.
Are fitted and supported by the concave groove 39 provided in the groove.

According to the signboard body A having the above configuration,
The packing 5 is provided between the winding portion 12 of the sheet 1 to which the tension is applied by the sheet tensioning mechanism 4 and the open edge 25 of the housing 2.
Since the packing 29 is sandwiched between the rectangular frame 21, the box-shaped member 23, and the sheet extending frame 24, the opening surface 26 is covered with the sheet 1. 1 is kept airtight. The packing 65 prevents dust and rainwater from entering the housing 2.

Next, the pressure applying means B will be described. The pressure applying unit B is a unit for applying an internal pressure of the housing. The pressure applying unit B illustrated in FIG. 1 includes an air supply source 71 such as a blower, an accumulator 72, a pressure reducing valve 73, and the like. ,
A check valve 74, a constant pressure regulating valve 75, and an air supply line 76 interposed therebetween are provided, and the air supply line 76 is connected to an air supply port 77 provided in the housing 2, The internal pressure is kept constant. The accumulator 72 and the pressure reducing valve 73 can be omitted if unnecessary. That is, the pressure applying means B is not limited to the configuration shown in FIG. 1, but may be one having a configuration capable of keeping the internal pressure of the housing 2 constant. In addition to the means for keeping the internal pressure constant, an air supply line having an air supply source 71 and a check valve 74 is formed from the above configuration, and the internal pressure is applied by constantly supplying a constant amount of air. The internal pressure in this case is not always constant. In addition, it is also possible to provide the accumulator 72 and the pressure reducing valve 73 as needed.

In the above configuration, if the internal pressure of the housing 2 is kept slightly higher than the external pressure by the pressure applying means B, the sheet 1 to which the tension is applied by the sheet An internal pressure higher than the atmospheric pressure is applied, and the sheet 1 is always kept pressed outward by the internal pressure. For this reason, the sheet tensioning mechanism 4 itself causes the sheet tensioning mechanism 4 itself to weaken the tension applied to the sheet 1, or the sheet tensioning mechanism 4 causes the sheet tensioning mechanism 4 to cause the sheet 1 itself to elongate. 1
Even when the tension applied to the seat 1 is weakened, the seat 1 is always kept in a tensioned state by the internal pressure of the housing 2 maintained slightly higher than the outside air pressure. For this reason, the sheet 1 does not become slack or wavy, and further, does not have a spherical shape in which the central portion is depressed inward. Therefore, there is no inconvenience that the outline of the display 100 provided on the sheet 1 is distorted, and the information display function due to them is impaired or unsightly. The above internal pressure is 10 to 200 (m
g / cm ² ) · Aq. This is because the sheet 1 is held in shape by the sheet extending frame 24 of the housing 2 and only needs to press the sheet 1.

In FIG. 2, reference numeral 8 denotes a backlight illumination tube (for example, a fluorescent lamp).

FIG. 5 shows another embodiment. In this embodiment, the front end of the sheet stretching frame 24, that is, the housing 2
This is an example in which the open edge 25 extends inward, the packing 5 is disposed over the entire open edge 25, and the wrap 12 of the sheet 1 is pressed against the packing 5. With this configuration, the pressure contact area between the packing 5 and the winding portion 12 of the sheet 1 is larger than that in FIG. 3, and there is an advantage that the airtightness can be easily improved.

FIG. 6 shows a modification of the seat tensioning mechanism 4. The seat tensioning mechanism 4 is fixed to the rectangular frame 21 and forms a part of the housing 2.
4, a packing 5 is provided on the outer surface of the sheet stretching frame 24 including the outer surface of the recess 81, and the outer peripheral edge of the sheet 1 superimposed on the packing 5 is pressed. The sheet 1 is held down by the holding plate 82 to apply tension. 83 is a stopper for fixing the pressing plate 82 to the sheet stretching frame 24.

FIG. 7 shows another modification of the seat tensioning mechanism 4. The seat tensioning mechanism 4 includes a ring portion 83 having an oval shape and an arm portion 84 extending from the ring portion 83. An annular member provided with an engagement piece 85 is used for the sheet stretching frame 24, and the packing 5 is attached to the outer surface of the front end corner of such a sheet stretching frame 24.
Are arranged. The outer peripheral edge of the sheet 1 is held by a bar 86 accommodated in the ring 83. In such a seat tensioning mechanism 4, one end 87 of the ring portion 83 is connected to the engagement piece 8 as shown by a virtual line in FIG.
5 and the seat tensioning mechanism 4 is rotated as indicated by the arrow with the engagement point as a fulcrum, whereby the ring portion 8 is rotated.
3 is housed inside the engagement piece 85 and the front end 88 of the arm 84 is engaged with an engagement portion 89 formed on the outer peripheral portion of the rear end of the sheet extending frame 24, whereby the sheet 1 is tensioned. Is applied, and the winding portion 12 of the sheet 1 is pressed against the packing 5.

In FIGS. 5 to 7, the same or corresponding parts as those shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

[0024]

According to the present invention, the internal pressure of the housing higher than the outside air pressure is constantly applied to the flexible sheet stretched without requiring any tension at the opening of the housing. Therefore, even if the tension given by the sheet tension mechanism is reduced, the sheet does not become loose or wavy, and the information display function can be maintained satisfactorily.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a signboard device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a signboard main body.

FIG. 3 is a longitudinal sectional view showing a main part of FIG. 2;

FIG. 4 is an explanatory view exemplifying an arrangement position of a seat tensioning mechanism;

FIG. 5 is a longitudinal sectional view showing a main part of a signboard body using a seat tensioning mechanism according to a modification.

FIG. 6 is a longitudinal sectional view showing a main part of a signboard body using a seat tensioning mechanism according to another modification.

FIG. 7 is a longitudinal sectional view showing a main part of a signboard body using a seat tensioning mechanism according to still another modification.

FIG. 8 is a longitudinal sectional view showing a main part of a conventional signboard device.

[Explanation of symbols]

 A signboard device B pressure applying means 1 sheet (flexible sheet) 2 housing 4 sheet tensioning mechanism 5 packing 12 sheet winding portion 26 opening

Claims (1)

(57) [Scope of request for utility model registration] 1. A housing having an opening, a flexible sheet disposed over the opening of the housing and having an outer peripheral portion wound around an opening edge of the housing surrounding the opening, and a sheet. A plurality of sheet tensioning mechanisms provided over the outer peripheral edge portion and the housing outside the winding portion with respect to the open edge portion for applying a tension force to the sheet, and the open surface is covered with the sheet. A signboard device comprising: pressure applying means for applying internal pressure to a housing;